Turn the bass down around 100hz. Frequencies in that neighborhood will make you sound muddy and boomy. Be sure you aren't overmodulating or have any clipping on the audio gear. It will cause distortion that a lot of guys have confused as too much bass. They start screwing with the eq and never make any progress. Try to use the eq to reduce the undesirable frequencies. Don't boost anything in the beginning. Once you get a good sound listen closely and try boosting some frequencies to see if you can make any improvement. Invest in a dummy load if you don't have one. Ive spent hours talking to myself and no one else had to hear me.